Home / 12,987,219.10-19,480,828.65-5,419,615.90

Finding the Fourth Proportional to 12,987,219.10, 19,480,828.65 and 5,419,615.90

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Solution

The fourth proportional to 12,987,219.10, 19,480,828.65 and 5,419,615.90 is: 8,129,423.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,987,219.10 : 19,480,828.65 = 5,419,615.90 : x
  2. Step 2: Convert to fraction form
    12,987,219.10/19,480,828.65 = 5,419,615.90/x
  3. Step 3: Cross multiply
    12,987,219.10x = 19,480,828.65 × 5,419,615.90
  4. Step 4: Simplify right side
    12,987,219.10x = 105,578,608,696,715.53
  5. Step 5: Solve for x
    x = 105,578,608,696,715.53/12,987,219.10
  6. Step 6: Final answer
    x = 8,129,423.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.